Is CVE-2026-43880 actively exploited?

No active exploitation of CVE-2026-43880 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-43880 be exploited remotely?

Yes. CVE-2026-43880 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-43880?

CVE-2026-43880 has a CVSS score of 5.3 (MEDIUM).

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MEDIUM

CVE-2026-43880

CWE-940Published: May 11, 2026· Updated: May 12, 2026

5.3

CVSS v3.1

EPSS:0.06%probability of exploitation in 30 daysPercentile:18.5th

Official Description

WWBN AVideo is an open source video platform. In versions up to and including 29.0, objects/sendEmail.json.php exposes two branches depending on whether contactForm=1 is submitted. When the parameter is omitted, the endpoint sets $sendTo to an attacker-supplied email and, for unauthenticated callers, uses the site's own contact email as the message From:/Reply-To:. The endpoint is explicitly allow-listed as a "public write action" in objects/functionsSecurity.php (line 885), so it requires no authentication or CSRF token. An unauthenticated attacker (solving a captcha) can force the site's own SMTP infrastructure to send attacker-composed emails to arbitrary recipients with the site's legitimate sender address, passing SPF/DKIM/DMARC for the site's domain — ideal for targeted phishing and brand impersonation. Commit 4e3709895857a5857f0edb46b0ee984de0d9e1a2 contains an updated fix.

NVD Source

Technical Analysis

CVE-2026-43880 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.